IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0xf1/0x100 lib/list_debug.c:51 Read of size 8 at addr ffff8881bb73f030 by task ip/7618 CPU: 1 PID: 7618 Comm: ip Not tainted 4.20.0-rc6-next-20181210+ #164 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 print_address_description.cold.4+0x9/0x1ff mm/kasan/report.c:187 kasan_report.cold.5+0x1b/0x39 mm/kasan/report.c:317 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135 __list_del_entry_valid+0xf1/0x100 lib/list_debug.c:51 __list_del_entry include/linux/list.h:117 [inline] list_del_init include/linux/list.h:159 [inline] neigh_mark_dead+0x13b/0x410 net/core/neighbour.c:125 neigh_flush_dev+0x3a1/0x960 net/core/neighbour.c:290 neigh_changeaddr+0x31/0x40 net/core/neighbour.c:319 ndisc_netdev_event+0xe6/0x5b0 net/ipv6/ndisc.c:1770 notifier_call_chain+0x17e/0x380 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1737 call_netdevice_notifiers_extack net/core/dev.c:1749 [inline] call_netdevice_notifiers net/core/dev.c:1763 [inline] dev_set_mac_address+0x293/0x3b0 net/core/dev.c:7780 do_setlink+0x7c7/0x3f30 net/core/rtnetlink.c:2447 __rtnl_newlink+0xcde/0x19e0 net/core/rtnetlink.c:3115 rtnl_newlink+0x6b/0xa0 net/core/rtnetlink.c:3240 rtnetlink_rcv_msg+0x46a/0xc20 net/core/rtnetlink.c:4969 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4987 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:632 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2117 __sys_sendmsg+0x11d/0x280 net/socket.c:2155 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f44c4eec320 Code: 02 48 83 c8 ff eb 8d 48 8b 05 14 7b 2a 00 f7 da 64 89 10 48 83 c8 ff eb c9 90 83 3d d5 d2 2a 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e ba 00 00 48 89 04 24 RSP: 002b:00007ffc87aa43f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ffc87aa84f0 RCX: 00007f44c4eec320 RDX: 0000000000000000 RSI: 00007ffc87aa4430 RDI: 0000000000000003 RBP: 00007ffc87aa4430 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000005c1082b3 R13: 0000000000000000 R14: 00000000006395c0 R15: 00007ffc87aa8cd0 Allocated by task 6328: save_stack+0x43/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] kasan_kmalloc+0xcb/0xd0 mm/kasan/common.c:482 __do_kmalloc mm/slab.c:3709 [inline] __kmalloc+0x15d/0x760 mm/slab.c:3718 kmalloc include/linux/slab.h:550 [inline] kzalloc include/linux/slab.h:740 [inline] neigh_alloc net/core/neighbour.c:375 [inline] ___neigh_create+0x13fc/0x2600 net/core/neighbour.c:553 __neigh_create+0x30/0x40 net/core/neighbour.c:640 ip6_finish_output2+0xa64/0x2940 net/ipv6/ip6_output.c:117 ip6_finish_output+0x58c/0xc60 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x232/0x9d0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ndisc_send_skb+0x1005/0x1560 net/ipv6/ndisc.c:491 ndisc_send_ns+0x3c6/0x8e0 net/ipv6/ndisc.c:633 addrconf_dad_work+0xbf2/0x1310 net/ipv6/addrconf.c:4081 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Freed by task 7493: save_stack+0x43/0xd0 mm/kasan/common.c:73 set_track mm/kasan/common.c:85 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:444 kasan_slab_free+0xe/0x10 mm/kasan/common.c:452 __cache_free mm/slab.c:3485 [inline] kfree+0xcf/0x230 mm/slab.c:3804 __rcu_reclaim kernel/rcu/rcu.h:233 [inline] rcu_do_batch kernel/rcu/tree.c:2452 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline] rcu_process_callbacks+0xd91/0x15f0 kernel/rcu/tree.c:2754 __do_softirq+0x308/0xb7e kernel/softirq.c:292 The buggy address belongs to the object at ffff8881bb73edc0 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 624 bytes inside of 1024-byte region [ffff8881bb73edc0, ffff8881bb73f1c0) The buggy address belongs to the page: page:ffffea0006edcf80 count:1 mapcount:0 mapping:ffff8881da800ac0 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000010200(slab|head) raw: 02fffc0000010200 ffffea0006ea2808 ffffea0007642008 ffff8881da800ac0 raw: 0000000000000000 ffff8881bb73e040 0000000100000007 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881bb73ef00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881bb73ef80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881bb73f000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881bb73f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881bb73f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================